<template>
    <div>
      <!--      面包屑导航区域-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--      卡片视图区域-->
      <el-card>
<!--        添加角色区域-->
       <el-row>
         <el-col>
           <el-button type="primary" @click="addRolesDialogVisible=true">添加角色</el-button>
         </el-col>
       </el-row>
<!--        角色列表区域-->
        <el-table :data="rolesList" border stripe>
<!--          展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bd_bottom',i1===0?'bd_top':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
<!--                渲染一级权限-->
                <el-col :span="5">
                 <el-tag closable @close="removeRightById(scope.row,item3.id)"> {{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
<!--                渲染二级和三级权限-->
                <el-col :span="19">
<!--                  通过for循环，嵌套循环二级权限-->
                  <el-row :class="[i2===0?'':'bd_top','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag closable @close="removeRightById(scope.row,item3.id)" type="success">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag closable @close="removeRightById(scope.row,item3.id)" type="warning" v-for="(item3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
<!--          索引列-->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
              <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeRole(scope.row.id)">删除</el-button>
              <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>

<!--      添加角色的对话框-->
      <el-dialog
        title="添加角色"
        :visible.sync="addRolesDialogVisible"
        width="50%"
        @close="addRolesDialogClosed">
<!--        对话框主体部分-->
        <el-form :model="addRolesForm" :rules="addRolesRules" ref="rolesFormRef" label-width="100px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addRolesForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addRolesForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
<!--        对话框底部按钮区域-->
          <span slot="footer" class="dialog-footer">
             <el-button @click="addRolesDialogVisible = false">取 消</el-button>
             <el-button type="primary" @click="addRoles">确 定</el-button>
         </span>
      </el-dialog>

<!--      修改角色信息的对话框-->
      <el-dialog
        title="修改角色信息"
        :visible.sync="editRolesDialogVisible"
        width="50%"
        @close="editRolesDialogClosed">
        <!--        对话框主体部分-->
        <el-form :model="editRolesForm" :rules="editRolesRules" ref="editRolesFormRef" label-width="100px">
          <el-form-item label="角色名称">
            <el-input v-model="editRolesForm.roleName" disabled></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editRolesForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!--        对话框底部按钮区域-->
        <span slot="footer" class="dialog-footer">
             <el-button @click="editRolesDialogVisible = false">取 消</el-button>
             <el-button type="primary" @click="editRoles">确 定</el-button>
         </span>
      </el-dialog>

<!--      分配权限的对话框-->
      <el-dialog
        title="提示"
        :visible.sync="setRightDialogVisible"
        width="30%"
      @close="setRightDialogClosed">
<!--        树形控件区域-->
        <el-tree :data="rightsList" :props="treeProps"
                 show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"
        ref="treeRef"></el-tree>
          <span slot="footer" class="dialog-footer">
           <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
          </span>
      </el-dialog>
    </div>
</template>

<script>
  export default {
    name: 'roles',
    data(){
      return {
        //所有角色列表数据
        rolesList:[],
        //控制添加角色对话框的隐藏与显示
        addRolesDialogVisible:false,
        //添加角色的表单数据
        addRolesForm:{
          roleName:'',
          roleDesc:''
        },
        // 添加角色的验证规则对象
        addRolesRules:{
          roleName:[
            { required: true, message: '请输入角色名', trigger: 'blur' },
            { min: 3, max: 10, message: '角色名的长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          roleDesc:[
            { required: true, message: '请输入角色描述', trigger: 'blur' },
            { min: 5, max: 20, message: '角色描述的长度在 5 到 20 个字符', trigger: 'blur' }
          ]
        },
        // 控制 修改角色信息对话框的显示与隐藏
        editRolesDialogVisible:false,
        //需要修改角色信息对象
        editRolesForm:{},
        //修改角色信息的验证规则对象
        editRolesRules:{
          roleDesc:[
            { required: true, message: '请输入角色描述', trigger: 'blur' },
            { min: 5, max: 20, message: '角色描述的长度在 5 到 20 个字符', trigger: 'blur' }
          ]
        },
        //控制 分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        //权限列表的数据
        rightsList:[],
        //树形控件的属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        //默认选中节点Id数组
        defKeys:[],
        //点击分配按钮时，获取当前角色的id
        roleId:''
      }
    },
    created () {
      this.getRolesList()
    },
    methods:{
      //获取所有角色列表
      async getRolesList(){
        const {data:res} = await this.$http.get('roles')
        if(res.meta.status!==200) return this.$message.error('获取角色列表失败！')
        this.rolesList=res.data
        console.log(this.rolesList)
      },
      //监听添加角色对话框的关闭，并重置对话框表单
      addRolesDialogClosed(){
        // console.log(this.$refs)
        this.$refs.rolesFormRef.resetFields()
      },
      //添加新角色
      addRoles(){
        //在真正添加角色之前进行预校验
        this.$refs.rolesFormRef.validate(async valid=>{
          // console.log(valid)
          if(!valid) return
          //如果这个valid是true，那么会发起真正添加新角色的网络请求
          const {data:res} = await this.$http.post('roles',this.addRolesForm)
          if(res.meta.status!==201) return this.$message.error('添加角色失败')
          this.$message.success('添加角色成功！')
          //添加角色成功后关闭添加角色的对话框
          this.addRolesDialogVisible=false
          //添加成功后刷新角色列表
          this.getRolesList()
        })
      },
      // 显示修改角色信息的对话框
      async showEditDialog(id){
        // console.log(id)
        this.editRolesDialogVisible=true
        const {data:res} = await this.$http.get('roles/'+id)
        if(res.meta.status!==200) return this.$message.error('查询角色信息失败！')
        this.editRolesForm=res.data
        console.log(this.editRolesForm)
      },
      //监听修改角色信息对话框的关闭
      editRolesDialogClosed(){
        this.$refs.editRolesFormRef.resetFields()
      },
      //修改角色信息并且提交
      editRoles(){
        //在向服务器提交之前，进行与校验
        this.$refs.editRolesFormRef.validate(async valid=>{
           // console.log(valid)
          if(!valid) return
          //如果通过与校验了，就发起请求
          //  console.log(this.editRolesForm.roleId)
          const {data:res} = await this.$http.put('roles/'+this.editRolesForm.roleId,{
            roleName:this.editRolesForm.roleName,
            roleDesc:this.editRolesForm.roleDesc
          })
          if(res.meta.status!==200) return this.$message.error('修改角色信息失败！')
          //关闭对话框
          this.editRolesDialogVisible=false
          //刷新角色列表
          this.getRolesList()
          //提示角色信息修改成功
          this.$message.success('修改角色信息成功！')
        })
      },
      //删除角色信息
      async removeRole(id){
        //弹窗询问是否删除角色信息
        const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>{
          return err
        })
        //点击确认删除，返回值为字符串confirm
        //点击取消，则返回为字符串 cancel
        // console.log(confirmResult)
        if(confirmResult!=='confirm'){
          return this.$message.info('已取消删除操作')
        }

        const {data:res} = await this.$http.delete('roles/'+id)
        if(res.meta.status!==200) return this.$message.error('删除角色失败！')
        this.$message.success('删除角色成功！')
        this.getRolesList()
      },
      //移除权限操作
      async removeRightById(role,rightId){
        //弹窗提醒是否继续删除
        this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {git
          this.$message({
            type: 'success',
            message: '删除成功!'
          });
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });
        });

        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status!==200){
          this.$message.error('删除权限失败！')
        }
        role.children=res.data
      },
      //显示分配权限的对话框
      async showSetRightDialog(role){
        this.roleId=role.id
        //发起获取权限列表的请求
        const { data:res} = await this.$http.get('rights/tree')
        if(res.meta.status!==200){
          return this.$message.error('获取权限列表失败！')
        }
        // console.log(res.data)
        this.rightsList=res.data

        //递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible=true
      },
      //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中去
      getLeafKeys(node,arr){
        if(!node.children){
          return arr.push(node.id)
        }
        //如果当前node不是第三节点
        // console.log('ok')
        node.children.forEach(item=>this.getLeafKeys(item,arr))
      },
      //监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys=[]
      },
      //分配权限
      async allotRights(){
        const keys=[
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')

        const {data:res} =await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        if(res.meta.status!==200) return this.$message.error('分配权限失败！')
        this.$message.success('分配权限成功！')
        this.getRolesList()
        this.setRightDialogVisible=false
      }
    }
  }
</script>


<style scoped>
.el-tag{
  margin: 7px;
}
  .bd_top{
    border-top: 1px solid #eee;
  }
  .bd_bottom{
    border-bottom: 1px solid #eee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
